unallowableWiktionary 原文英美构词拆解unun-前缀allowableallowable词干un-(added to adjectives or past participles) not · (added to nouns) lack of词源说明From un- + allowable.释义形容词adjective1Not allowable2For which an allowance may not be claimed同族词派生词 2unallowableness·unallowably